Note 3 - Loans (Details) - Impaired Loans With Troubled Debt Restructurings (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans	$ 7,229	$ 16,492
Unpaid Principal Balance	7,653	16,848
Related Allowance	1,248	3,801
Average Balance-Impaired Loans	7,583	18,527
Interest Income Recognized	141	643
Real Estate - Residential Mortgage (Member)
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans	1,753	2,230
Unpaid Principal Balance	1,981	2,283
Related Allowance	369	433
Average Balance-Impaired Loans	2,089	2,266
Interest Income Recognized	49	124
Commercial real estate lending [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans	4,338	7,892
Unpaid Principal Balance	4,527	8,190
Related Allowance	624	1,775
Average Balance-Impaired Loans	4,349	8,260
Interest Income Recognized	82	254
Builder Line Lending [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans	14	0
Unpaid Principal Balance	17	0
Related Allowance	4	0
Average Balance-Impaired Loans	15	1,407
Interest Income Recognized	0	0
Commercial Business Lending [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans	801	812
Unpaid Principal Balance	805	817
Related Allowance	203	112
Average Balance-Impaired Loans	807	827
Interest Income Recognized	4	13
consumer (Member)
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans	323	324
Unpaid Principal Balance	323	324
Related Allowance	48	49
Average Balance-Impaired Loans	323	324
Interest Income Recognized	6	16
Land acquisition and development lending [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment in Loans		5,234
Unpaid Principal Balance		5,234
Related Allowance		1,432
Average Balance-Impaired Loans		5,443
Interest Income Recognized		$ 236